Flushing device for hydraulic elevators.



J. F. HUGHES.

FLUSHING DEVICE FOR HYDRAULIC ELEVATORS.

APPLICATION HLED JUNE 1913.

Patented Nov. 30, 1915.

inwirnn @TATE AE anion Joann-Areas. iriidi ins, or TORONTO, ONTARIO, CANADA.

rnus iirlve DEVICE FOR nrn'aaurmsnsmroas.

Specification of Lee-earnest. fPatentedNov. 350, 1915.

Application filed-June 4,1913. Seria1-No.'771,688.

To zz whom itma z concern: 7 I a Be it known that 1, JOHN FRANCES HUGHES, resident of 43 Empress Crescent, in the city of Toronto, county of York, Province of Ontario,'in the Dominion of Canada, chief engineer, have invented certain new and useful Improvements in Flushing Devicesfor Hydraulic Elevators, of

Y which the following-is a specification.

to avoid delays in the elevator service, and

generally to provide a simple cheap and durable flushing device.

In the drawings, Figure 1 is a plan view of the arrangement of the pipes in relation to the plunger shaft. Fig. 2 is a ver tical section view of the plunger shaft and piston and plunger, showing the pipes utilized in this flushing device.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, 1 is the plunger shaft in which the plunger 2 operates as customary in hydraulic elevators, said plunger carrying at its upper end the platform 3.

f is the inlet and outlet pipe having at the upper end the customary feed pipe 5, anddischarge pipe 6 said inlet and outlet pipe 4 extending downwardly and entering the plunger shaft 1 at 7.

8 is a branch waste pipe from the inlet and outlet pipe 4 leading to the drain or any suitable place and having therein a suitable cut-off.

9 is a valve cutting off the inlet and outlet of water from the supply pipe 4 between the source of supply and the entrance to said waste pipe 8.

10 is a flushing pipe having the upper end thereof 11 extending outwardly from the plunger 2 adjacent to the upper end thereof, said flushing pipe 10 here shown inside the piston and movingup and down with the'travelof the piston though it must be understood that this pipe in many instances will be outside the plunger shaft in which case it will not move up and down with the piston.

, The'upper end llof thefiushing pipe 10 terminates in the flexible joint connection 13.

14s is a hosehaving corresponding flexible,

joint connection at the end thereof adapted to be secured to the fiexible joint 13, said hose at the other end beingsecured -to a I suitable source of supply of water, prefer:

ably the supply pipe beyond the valve 9.

I It will be thu's seen that on opening the valve in the feed pipe 5 and closing the valve-9 and turning the water into the flushing pipe 10, a considerable stream of Water will fiow down said flushing pipe into the bottom of the plunger shaft 1, and as the ordinary supply has been cut off, the ingress of water to the said plunger shaft below the plungerz, will drive said water up to and into the inlet and outlet pipe 4 as far as the branch exhaust pipe 8 and out through said exhaust pipe to the drain, and as this stream is conaway the sand flows into the waste pipe 8 and from there on to the drain.

This invention is manifest to those who are accustomed to cleaning out hydraulic elevators, for, under the system now used, it takes the best part of a day to clean out the plunger shaft, whereas in the present invention it is only a matter of minutes and the elevator can then be set running again without interference with or taking away any of the parts during the flushing process.

7 What I claim is r 1 l. The combination with the plunger shaft of a hydraulic elevator, a plunger operating in said shaft/and a source of water supply, of a flushing pipe extending to the under side of said plunger within said plunger, a pipe connected with the upper end of said flushing pipe, a flexible tube connecting the upper pipe to the water supply and an exhaust pipe.

2. In a flushing device for hydraulic elevators, a flushing pipe extending downwardly within the plunger shaft and communicating with the lower end of the plunger shaft, an inlet and outlet pipe extending outwardly from the said plunger shaft, and a waste pipe extending from said inlet and putlet pipe.

8. In a flushing device for hydraulic elevators, a flushing pipe extending downwardly and communicating with the lower end of said plunger shaft and at its upper end adapted to be connected to a suitable source of supply, an inlet and outlet pipe extendingoutwardly from the plunger shaft and connected to a'suitable' source of supply, a waste pipe branching from said inlet and outlet pipe intermediate of the length thereof and a cut off valve in said inlet and outlet pipe between said branch pipe and the source of supply.

4. In a flushing device for hydraulic elevators, a flushing pipe extending downwardly and communicating with the lower end of the plunger shaft, an inlet and outlet pipe extending outwardly from plunger I shaft and suitably connected to discharge and feed pipes, a pipe connecting said feed pipe with said flushing pipe, a waste pipe branching from 'said inlet and outlet pipe adjacent to the plunger shaft, and a cut ofl valve in said inlet and outlet pipe between said branch pipe and said feed pipe.

5. In a device of the class described, in combination a plunger shaft, a plunger, a flushing pipe extending downwardly through the interior of said plunger and the bottom thereof and projecting outwardly from said plunger at theupper end, said upper end terminating in a flexible joint member, an inlet and outlet pipe, a branch waste pipe from' said inlet and outlet pipe, a cut off valve in said inlet and outlet pipe between said branch waste pipe and the supply and a hose having a' flexible joint member on one end connected to the aforesaid flexible joint member, said hose at the other end being connected to a suitable source of supply.

Signed at the city of Toronto, this fifth day of April 1913.

JOHN FRANCES HUGHES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington. D. 0. 7 g I 

